EP3050449A1 - Casque comprenant une couche d'absorption d'énergie - Google Patents

Casque comprenant une couche d'absorption d'énergie Download PDF

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Publication number
EP3050449A1
EP3050449A1 EP16000174.9A EP16000174A EP3050449A1 EP 3050449 A1 EP3050449 A1 EP 3050449A1 EP 16000174 A EP16000174 A EP 16000174A EP 3050449 A1 EP3050449 A1 EP 3050449A1
Authority
EP
European Patent Office
Prior art keywords
energy
absorbing layer
internal
helmet
foam liner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16000174.9A
Other languages
German (de)
English (en)
Inventor
Alojz Hanuliak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smid Petr
Original Assignee
Smid Petr
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Smid Petr filed Critical Smid Petr
Publication of EP3050449A1 publication Critical patent/EP3050449A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/10—Linings
    • A42B3/12—Cushioning devices
    • A42B3/124—Cushioning devices with at least one corrugated or ribbed layer
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/062—Impact-absorbing shells, e.g. of crash helmets with reinforcing means
    • A42B3/063—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
    • A42B3/064—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures with relative movement between layers

Definitions

  • the invention generally relates to protective means of the head, especially a helmet with a firm, but a breakable outer shell, comprising an energy-absorbing layer arranged under such external shell in a sliding way.
  • Such protective means mostly consist of a firm outer shell, made often of plastic or a composite material, and of an energy-absorbing layer called liner. In the most cases, the liner is made of a softer plastic or a similar lining.
  • the protective helmets or crash helmets are to be designed to meet requirements stipulated by the law that relate to, besides other things, the maximum acceleration that may occur in the brain at the defined load. Typically tests are performed in which a skull mock-up equipped with a helmet is subject to a radial impact towards the head. Modern helmets have good abilities to absorb energy in the case when the impacts are led in radial direction towards the skull. Energy absorption for other directions is not always optimal.
  • the head motion is accelerated into a translational motion and that results in a linear acceleration of the head.
  • the translational acceleration may cause a fracture of the skull and/or a pressure on the brain tissue or directly a brain tissue injury.
  • any mere radial impacts rather rare.
  • a mere tangential impact resulting in an angle acceleration of the head is also rare.
  • the most usual type of impact is an inclined impact which is a combination of radial and tangential forces affecting the head simultaneously which causes e.g. a brain concussion.
  • Rotational acceleration of the skull causes an injury of body elements connecting the brain with the skull and also an injury of the brain.
  • Example of rotational injuries are subdural hematomas, SDH, bleeding as a consequence of a rupture of a vessel on one side, and on the other side diffuse axonal injury, DAI, that could be summarized as elongation of nerve fibres as a consequence of a high deformation shearing in the brain tissue.
  • DAI diffuse axonal injury
  • the head has natural protective systems that try to damp any deformation forces by means of a hard skull and the spinal fluid below it.
  • the spinal fluid acts as a rotary shock absorber.
  • a helmet is disclosed with an external layer and an internal layer for the contact with the user's head, comprising further a middle layer consisting of an anisotropic cellular material that has a relatively low resistance to deformation resulting from tangential forces on the helmet.
  • the anisotropic material may be a foam type or a honeycomb material, the foam is preferably a foam type with closed cells.
  • the helmet allows a partial disturbance of tangential impacts on the helmet that are causing a lower rotational acceleration or a slowdown of the user's head in comparison with using a helmet made from an isotropic foam, and it allows to absorb a huge volume of rotational energy.
  • Known is also a solution disclosed in pat.
  • EP2428129 where the protective helmet contains an external shell which is made of a hard material.
  • the impact on the head is received through the internal part that is arranged on the internal side of the external shell.
  • the internal part is split into a liner and a double-faced head pad.
  • a solution which is near to a good solution of this problem is, e.g. the solution provided under pat. US2004250340 , wherein internal and external layers of the protective helmet are disclosed that are overlapping and attached to allow a friction sliding of at least one zone of the external layer over the internal layer. Such friction is reduced by means of randomly arranged ball-shaped surfaces on the outer side of one of internal parts. All here mentioned solutions are not fully effective during an impact coming from any side.
  • the essence of the invention lies in the fact that the internal energy-absorbing layer consists of a liner made of a moulded foam to which external surface being directed towards the internal part of the firm external skeleton a plastic strip is attached firmly or slidingly that is equipped with a bristle material or bristles, wherein this internal moulded foam liner, skeleton, is together with the attached plastic strip with a bristle material or bristles preferably arranged in a textile casing and/or between textile interlays arranged between the firm external skeleton and the bristle material or bristles to guarantee the minimum adhesion with the external skeleton, wherein in one of further preferable solutions such internal moulded foam liner with the attached plastic strip with the bristle material or bristles is further equipped with a tiltable joint shack
  • the tiltable joint shackle is in a preferred embodiment made of plastic and/or rubber, where it is tilting at the moment of an impact together with the entire internal moulded foam liner equipped with a plastic strip with bristles that especially at an inclined impact are tilting their whole height smoothly and after this motion has finished, they allow returning of the whole internal moulded foam liner into the original position.
  • Fig. 1 illustrates a total side view of the protective helmet
  • Fig. 2 is a cross section of the helmet
  • Fig. 3 is a partial cross section illustrating the internal comfortable foam skeleton of the helmet with the bristle material or bristles in the casing
  • Fig. 4 is a cross section of the helmet with the tiltable shackle.
  • the shape of the helmets derived from the purpose of use is not the subject-matter of this invention.
  • Helmet comprising a slidable energy-absorbing layer, consisting of a firm external skeleton and an internal, energy-absorbing layer in accordance with this technical solution is applicable both for sport helmets and for work safety helmets.

Landscapes

  • Helmets And Other Head Coverings (AREA)
EP16000174.9A 2015-01-30 2016-01-26 Casque comprenant une couche d'absorption d'énergie Withdrawn EP3050449A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2015-30663U CZ28115U1 (cs) 2015-01-30 2015-01-30 Helma obsahující energii absorbující vrstvu

Publications (1)

Publication Number Publication Date
EP3050449A1 true EP3050449A1 (fr) 2016-08-03

Family

ID=53266599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000174.9A Withdrawn EP3050449A1 (fr) 2015-01-30 2016-01-26 Casque comprenant une couche d'absorption d'énergie

Country Status (2)

Country Link
EP (1) EP3050449A1 (fr)
CZ (1) CZ28115U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111148444A (zh) * 2017-08-29 2020-05-12 瑞恩莱博斯有限公司 能量吸收系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040250340A1 (en) 2003-02-05 2004-12-16 Dennis Piper Protective headguard
WO2006005143A1 (fr) 2004-07-13 2006-01-19 K.U. Leuven Research & Development Casque de protection
WO2006022680A1 (fr) * 2004-08-04 2006-03-02 Full90 Sports, Inc. Protege-tete
EP2428129A2 (fr) 2010-09-09 2012-03-14 Oliver Schimpf Casque de protection; procédé de réduction ou de prévention d'une blessure à la tête
US20130042397A1 (en) * 2010-05-07 2013-02-21 Mips Ab Helmet
US20130122256A1 (en) * 2010-05-12 2013-05-16 Svein Kleiven Protective material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040250340A1 (en) 2003-02-05 2004-12-16 Dennis Piper Protective headguard
WO2006005143A1 (fr) 2004-07-13 2006-01-19 K.U. Leuven Research & Development Casque de protection
WO2006022680A1 (fr) * 2004-08-04 2006-03-02 Full90 Sports, Inc. Protege-tete
US20130042397A1 (en) * 2010-05-07 2013-02-21 Mips Ab Helmet
US8578520B2 (en) 2010-05-07 2013-11-12 Mips Ab Helmet
US20130122256A1 (en) * 2010-05-12 2013-05-16 Svein Kleiven Protective material
EP2428129A2 (fr) 2010-09-09 2012-03-14 Oliver Schimpf Casque de protection; procédé de réduction ou de prévention d'une blessure à la tête

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111148444A (zh) * 2017-08-29 2020-05-12 瑞恩莱博斯有限公司 能量吸收系统
US11457683B2 (en) 2017-08-29 2022-10-04 Rheon Labs Limited Energy absorbing systems
CN111148444B (zh) * 2017-08-29 2022-11-08 瑞恩莱博斯有限公司 能量吸收系统
US11950652B2 (en) 2017-08-29 2024-04-09 Rheon Lbas Ltd Energy absorbing systems

Also Published As

Publication number Publication date
CZ28115U1 (cs) 2015-04-20

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